Improved rowlock



p UNITED I STATES PATENT OFFICE.

VILLIAM D. BUSH, OF FALL RIVER, MASSACHUSETTS.

IMPROVED ROWLOCK.

Specification forming part of Letters Patent No. 33,823, dated December3, 1861.

To all whom it may concern:

Be it known that I, WILLIAM D. BUSH, of Fall River, in the county ofBristol and State of Massachusetts, have invented a new and valuableImprovement in a Rowlook; andI do hereby declare that the following is afull and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, in Which- Figure 1 is aperspective view of my invention.Fig. 2 is a perspective view of the socket. Fig. 3 is a perspective viewof the rowlock removed from the socket. Fig. 4 is a vertical section ofthe socket.

My invention consists in a mode for securing a rowiock in a socket andsecuring a mat in a rowlock.

To enable others skilled in the art to maken and use my invention, Iwill proceed to describe its construction and operation.

In Fig. 1, A is the rowlock; B', the socket; D', aleather mat; E', theend of the shaftof the rowlock; a', a pin projecting one-eighth inch outof E', b', a screw which 'secures the mat in a recess which is cast inthe rowlock, and Which is represented by F3 in Fig. 3. c c c c are holesthrough the cap for the purpose of securing the socket in the gnnwale.

In Fig. 2, B2 is the socket cast with the cap C2. Its bore isried with aspiral groove commencing at d and ending at cl2.

In Fig. 3, A3 is the rowlock removed from the socket. Ellis the shaft,which is made to fit the bore of the socket. F3 is a recess cast in therowlock, in which is secured the mat shown by D, (see Fig. l.) CL3 is apin permanently secured in E2, (See of, Fig. 1,) 0ne eighth inchdiameter, and which projects oneel'ghth inch.

In Fig. 4, C4 is the cap. G4 is the bore of the socket. d* is a spiralgroove cast in the bore one-eighth inch broad and one-eighth inch deep,which commences at e and ends at e4, making one revolution.

Operation: The rowlock and socket being constructed as herein specified,the socket being affixed in the gnnwale of a boat in the usual manner,the novelty and operation may be noted. By applying the rowlock A3 (seeFig. 3) to the socket B2 so that pin ai will enter the spirally-ril'ledgroove, (see d4 in Fig. 4,) its descent will make one revolution, pin asfollowing the groove and' appearing when the rowlock is in its properposition, as at a in Fig. 1. By revolving the rowlock half a revolutioneither Way When it is in its proper position in the socket, pin a willbe on the opposite side of the socket from Where the spiral groovecommences and ends, and the rowlock is held in the socket by pin o. andcannot be removed from it till revolved back and pin a enters the grooveat the .lower end of the socket, when it may be removed by revolving itcontrary from the manner of inserting it. Then the oar is in therowlock, it will be prevented from revolving far enough for pin a toreach the groove.

In this invention I do not claim or desire to claim any devicespreviously invented or patented for rowlocks; but n Vhat I do claim asmy invention, and desire to secure by Letters Patent, is-

Recess F3, pin a3, and the spirally-rifled socket G4, constructed andoperating as and for the purpose set forth.

WILLIAM D. BUSH. lVitnesses:

B. F. WINsLoW CHAs. Il. BUSH.

